Application Technique for Restoring Resistance (IMAGE)

Washington University in St. Louis

Application Technique for Restoring Resistance

Caption

Spraying resistant horseweed under cold conditions circumvented the resistance mechanism. All of the cold-acclimated horseweed treated with herbicide at normal field-rate levels or higher succumbed to its lethal effects (top). Resistant horseweed plants maintained under warm conditions survived treatment (bottom), with the exception of plants sprayed at 10 times the usual field-use rate (dead plants to right in bottom block).

Credit

Andre d'Avignon/Pest Management Science

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